It's traditional. We wait for the last minute to get our talk proposals
in for conferences.
Well, the last minute has arrived. The CFP for ApacheCon Seville closes
on September 9th, which is less than 2 weeks away. It's time to get your
talks in, so that we can make this the best ApacheCon yet.
It's also time to discuss with your developer and user community whether
there's a track of talks that you might want to propose, so that you
have more complete coverage of your project than a talk or two.
For Apache Big Data, the relevant URLs are:
Event details:
http://events.linuxfoundation.org/events/apache-big-data-europe
CFP:
http://events.linuxfoundation.org/events/apache-big-data-europe/program/cfp
For ApacheCon Europe, the relevant URLs are:
Event details: http://events.linuxfoundation.org/events/apachecon-europe
CFP: http://events.linuxfoundation.org/events/apachecon-europe/program/cfp
This year, we'll be reviewing papers "blind" - that is, looking at the
abstracts without knowing who the speaker is. This has been shown to
eliminate the "me and my buddies" nature of many tech conferences,
producing more diversity, and more new speakers. So make sure your
abstracts clearly explain what you'll be talking about.
For further updated about ApacheCon, follow us on Twitter, @ApacheCon,
or drop by our IRC channel, #apachecon on the Freenode IRC network.
--
Rich Bowen
WWW: http://apachecon.com/
Twitter: @ApacheCon

Arko,
Please send your question to the .Net driver mailing list where you'll have
better chances to get an answer:
https://groups.google.com/a/lists.datastax.com/forum/#!forum/csharp-driver-user
thanks
On Wed, Feb 24, 2016 at 6:37 PM, Arko Provo Mukherjee <
arkoprovomukherjee@gmail.com> wrote:
> Hello,
>
> I am trying to play with the Datastax .Net Driver for Cassandra.
>
> I understand that the .Fill() method is not implemented in CqlDataAdapter.
>
> Hence I was wondering if there is any elegant way to copy a Cassandra
> Row to a DataRow? I can then construct a DataSet myself.
>
> Thanks & regards
> Arko
>
--
Bests,
Alex Popescu | @al3xandru
Sen. Product Manager @ DataStax

Hello,
I am trying to play with the Datastax .Net Driver for Cassandra.
I understand that the .Fill() method is not implemented in CqlDataAdapter.
Hence I was wondering if there is any elegant way to copy a Cassandra
Row to a DataRow? I can then construct a DataSet myself.
Thanks & regards
Arko

FOSDEM 2016 - take action by 4th of December 2015Roman Shaposhnik <rvs@apache.org>urn:uuid:%3c20151201063021-GA38185@usxxshaporm1-corp-emc-com%3e2015-12-01T06:30:21Z

As most of you probably know FOSDEM 2016 (the biggest,
100% free open source developer conference) is right
around the corner:
https://fosdem.org/2016/
We hope to have an ASF booth and we would love to see as
many ASF projects as possible present at various tracks
(AKA Developer rooms):
https://fosdem.org/2016/schedule/#devrooms
This year, for the first time, we are running a dedicated
Big Data and HPC Developer Room and given how much of that
open source development is done at ASF it would be great
to have folks submit talks to:
https://hpc-bigdata-fosdem16.github.io
While the CFPs for different Developer Rooms follow slightly
different schedules, but if you submit by the end of this week
you should be fine.
Finally if you don't want to fish for CFP submission URL,
here it is:
https://fosdem.org/submit
If you have any questions -- please email me *directly* and
hope to see as many of you as possible in two months!
Thanks,
Roman.

[ANNOUNCE] CFP open for ApacheCon North America 2016Rich Bowen <rbowen@rcbowen.com>urn:uuid:%3c5655F09A-7050203@apache-org%3e2015-11-25T17:32:10Z

Community growth starts by talking with those interested in your
project. ApacheCon North America is coming, are you?
We are delighted to announce that the Call For Presentations (CFP) is
now open for ApacheCon North America. You can submit your proposed
sessions at
http://events.linuxfoundation.org/events/apache-big-data-north-america/program/cfp
for big data talks and
http://events.linuxfoundation.org/events/apachecon-north-america/program/cfp
for all other topics.
ApacheCon North America will be held in Vancouver, Canada, May 9-13th
2016. ApacheCon has been running every year since 2000, and is the place
to build your project communities.
While we will consider individual talks we prefer to see related
sessions that are likely to draw users and community members. When
submitting your talk work with your project community and with related
communities to come up with a full program that will walk attendees
through the basics and on into mastery of your project in example use
cases. Content that introduces what's new in your latest release is also
of particular interest, especially when it builds upon existing well
know application models. The goal should be to showcase your project in
ways that will attract participants and encourage engagement in your
community, Please remember to involve your whole project community (user
and dev lists) when building content. This is your chance to create a
project specific event within the broader ApacheCon conference.
Content at ApacheCon North America will be cross-promoted as
mini-conferences, such as ApacheCon Big Data, and ApacheCon Mobile, so
be sure to indicate which larger category your proposed sessions fit into.
Finally, please plan to attend ApacheCon, even if you're not proposing a
talk. The biggest value of the event is community building, and we count
on you to make it a place where your project community is likely to
congregate, not just for the technical content in sessions, but for
hackathons, project summits, and good old fashioned face-to-face networking.
--
rbowen@apache.org
http://apache.org/

Test of datastax java driver on cassandra and using nodetoolJun Wu <wuxiaomin98@hotmail.com>urn:uuid:%3cBLU437-SMTP21449D13701D6CCB25DCE0B9440@phx-gbl%3e2015-09-23T00:37:10Z

On Mon, May 11, 2015 at 8:33 PM, Brian Miles <selimnairb@gmail.com> wrote:
> I'm using Cassandra 2.1.5 running on Debian 7. The data were written using
> the latest version of the C API
>
Have you posted this question to the C/C++ driver mailing list?
https://groups.google.com/a/lists.datastax.com/forum/#!forum/cpp-driver-user
--
Bests,
Alex Popescu | @al3xandru
Sen. Product Manager @ DataStax

timestamp and timeuuid strangenessBrian Miles <selimnairb@gmail.com>urn:uuid:%3cCAHS5_z=6ibrLQEvSCZh4-2EsZ4gzABnGyjkb2T1tqnNP_Pyu+g@mail-gmail-com%3e2015-05-12T03:33:27Z

Hello,
I'm seeing strange things when storing both timestamp and timeuuid columns
from the C API using prepared statements. For example, I have some data
starting at 1/1/1981. The unix timestamp for this is 347173200, which I
can get out of my table as follows:
> select UNIXTIMESTAMPOF(date) from variables_by_date_patch limit 1;
UNIXTIMESTAMPOF(date)
-----------------------
347173200
However, when looking at the same data as a date:
> select DATEOF(date) from variables_by_date_patch limit 1;
DATEOF(date)
--------------------------
1970-01-04 19:26:13-0500
My table is defined as:
> describe table variables_by_date_patch;
CREATE TABLE variables_by_date_patch (
variable text,
date timeuuid,
patchid text,
value double,
PRIMARY KEY (variable, date, patchid)
) WITH CLUSTERING ORDER BY (date ASC, patchid ASC)
I'm using Cassandra 2.1.5 running on Debian 7. The data were written using
the latest version of the C API (
https://github.com/datastax/cpp-driver/commit/3310ab178d1188d5e85c03964247667be6db520c
).
Any hints would be greatly appreciated.
Thanks,
Brian

Is the Ruby client threadsafe? For example...
session = Cassandra.cluster.connect
Thread.new{ session.execute("select * from ks1.table1") }
Thread.new{ session.execute("select * from ks2.table2") }
Notice multiple threads accessing the same session object, and also notice
different keyspaces being queried in the CQL.
Will that code work? Thank you for the help.

This question would be better asked on the C# driver mailing list
https://groups.google.com/a/lists.datastax.com/forum/#!forum/csharp-driver-user
1. You should check the specific version tag in GitHub. All the source code
is in there.
2. As a side note, the next release of the DataStax C# driver will be
strongly named.
On Mon, Feb 2, 2015 at 8:46 AM, Hakan Ornek <ornekh@gmail.com> wrote:
> Hi All,
> I need a Cassandra.Data.Dll Source Code, Because My project required a
> strong name but Cassandra.Data.Dll does not have a strong name.
> <https://github.com/datastax/csharp-driver> source code have only
> Cassandra.dll. How can i find Cassandra.Data source code or strong name
> compiled Cassandra.Data.dll...
>
> Thanks for helps...
>
> Hakan
>
>
--
[:>-a)
Alex Popescu
Sen. Product Manager @ DataStax
@al3xandru

Hi All,
I need a Cassandra.Data.Dll Source Code, Because My project required a
strong name but Cassandra.Data.Dll does not have a strong name.
<https://github.com/datastax/csharp-driver> source code have only
Cassandra.dll. How can i find Cassandra.Data source code or strong name
compiled Cassandra.Data.dll...
Thanks for helps...
Hakan

Do you mean the Cassandra wiki?
If so then I would contact dev@cassandra.apache.org and request that you
get added to the contributors group. You can then add content at your own
will.
Lewis
On Fri, Dec 5, 2014 at 11:50 PM, Achilleas Anagnostopoulos <
achilleas.imap.mbox@gmail.com> wrote:
> Hello,
>
> I am working on a client for Dart which is available at
> https://github.com/achilleasa/dart_cassandra_cql
> and I am wondering if it can be added to the list of available community
> drivers.
>
> Thanks
>
>
--
*Lewis*

Hi Gayana,
Which driver are you using?
The Datastax Java Driver?
Lewis
On Mon, Dec 1, 2014 at 4:42 AM, Gayana Chandrasekara <
gayanachandrasekara@gmail.com> wrote:
> Hi,
>
> I am using Cassandra CQL driver version 1.0.3 to connect to a Cassandra
> 2.0.9 cluster. I am using the CQL java driver in order to benchmark
> performance. Is there any impact for the test result due to the CQL driver?
> And what is the latest version of the driver recommended to use?
>
> Thanks.
> --
> Sincerely,
> Gayana.
>
--
*Lewis*

Hi,
I am using Cassandra CQL driver version 1.0.3 to connect to a Cassandra
2.0.9 cluster. I am using the CQL java driver in order to benchmark
performance. Is there any impact for the test result due to the CQL driver?
And what is the latest version of the driver recommended to use?
Thanks.
--
Sincerely,
Gayana.

Hi all,
I've just released the first beta version of Caffinitas Mapper.
Caffinitas Mapper is an advanced Java object mapper for Apache Cassandra NoSQL database. It
offers an annotation based declaration model with a wide range of built-in features like JPA
style inheritance with table-per-class and single-table model. Composites can be mapped using
either Apache Cassandra’s new UserType or as distinct columns in a table. Cassandra collections,
user type and tuple type are directly supported - collections can be loaded lazily. Entity
instances can be automatically denormalized in other entity instances. CREATE TABLE/TYPE and
ALTER TABLE/TYPE CQL DDL statements can be generated programmatically. Custom types can be
integrated using a Converter API. All Cassandra consistency levels, serial consistency and
batch statements are supported.
All Apache Cassandra versions 1.2, 2.0 and 2.1 as well as all DataStax Community and Enterprise
editions based on these Cassandra versions are supported. Java 6 is required during runtime.
Support for legacy, Thrift style models, is possible with Caffinitas Mapper since it supports
CompositeType and DynamicCompositeType out of the box. A special map-style-entity type has
been especially designed to access schema-less data models.
Caffinitas Mapper is open source and licensed using the Apache License, Version 2.0.
Website & Documentation: http://caffinitas.org/
API-Docs: http://caffinitas.org/mapper/apidocs/
Source Repository: https://bitbucket.org/caffinitas/mapper/
Issues: https://caffinitas.atlassian.net/
Mailing List: https://groups.google.com/d/forum/caffinitas-mapper

Re: Intravert back in actionLewis John Mcgibbney <lewis.mcgibbney@gmail.com>urn:uuid:%3cCAGaRif1_oDmODie+tWaX7vVx4OtNXtvm=2uN2Eq0GiXSTHKbvw@mail-gmail-com%3e2014-06-18T19:26:40Z

Thanks for posting this Ed.
I was following intravert-ug a while ago when you guys were actively
pushing changes however I stopped following it due to too much mail traffic
generally.
Thanks for posting here.
On Wed, Jun 18, 2014 at 2:55 PM, Edward Capriolo <edlinuxguru@gmail.com>
wrote:
> After a long break I decided to get active in intravert again.
>
> https://github.com/zznate/intravert-ug/
>
> Intravert does cool things like user defined transformations and runs
> triggers server (cassandra) side.
>
> Originally much of the implementation was build with vertx in mind. Over
> time the callbacks and limitations of the async framework slowly drove me
> quite insane. I finally decided to cut bait and implement the original
> features around a simple blocking json over http API.
>
> I started the project clean slate and am slowly back porting the features.
>
> The concept is fairly simple. You send json:
>
> https://github.com/zznate/intravert-ug/blob/master/src/test/resources/jtest/putget/input.json
> You get back json:
>
> https://github.com/zznate/intravert-ug/blob/master/src/test/resources/jtest/putget/output.json
>
> I have some new crazy ideas I want to play with. You might want to add some
> as well.
>
> Have fun,
> Edward
>
--
*Lewis*

Intravert back in actionEdward Capriolo <edlinuxguru@gmail.com>urn:uuid:%3cCAENxBwybSELdxPmB2HzUa-fTn1J49ZZ40_H0KUSFgf8eZ5VdZA@mail-gmail-com%3e2014-06-18T18:55:03Z

After a long break I decided to get active in intravert again.
https://github.com/zznate/intravert-ug/
Intravert does cool things like user defined transformations and runs
triggers server (cassandra) side.
Originally much of the implementation was build with vertx in mind. Over
time the callbacks and limitations of the async framework slowly drove me
quite insane. I finally decided to cut bait and implement the original
features around a simple blocking json over http API.
I started the project clean slate and am slowly back porting the features.
The concept is fairly simple. You send json:
https://github.com/zznate/intravert-ug/blob/master/src/test/resources/jtest/putget/input.json
You get back json:
https://github.com/zznate/intravert-ug/blob/master/src/test/resources/jtest/putget/output.json
I have some new crazy ideas I want to play with. You might want to add some
as well.
Have fun,
Edward

It’s already been added to the wiki but you’re welcome to get wiki write access. Also,
is there any reason that building on top of seestar isn’t viable? The guy who wrote that
is a Cassandra committer who just doesn’t have the time to do it all but if others worked
with him on it, he could probably manage it and help.
On 18 Jun 2014, at 14:54, Lewis John Mcgibbney <lewis.mcgibbney@gmail.com> wrote:
> +1 get it in there.
> You just need to obtain wiki karma.
> I would head over to IRC and see if someone can grant you over there.
> Great work.
> Lewis
>
>
> On Tue, Jun 17, 2014 at 5:16 PM, Mathieu D'Amours <matt@forest.io> wrote:
>
>> Hey all,
>>
>> I was wondering if the Erlang driver I’m maintaining at
>> http://github.com/matehat/cqerl could be added to the list of community
>> drivers for cassandra. It’s the most popular one for Erlang out there at
>> the moment and the most actively maintained.
>>
>> Thanks!
>>
>> md ∙ matt@damours.org
>>
>>
>>
>
>
> --
> *Lewis*

+1 get it in there.
You just need to obtain wiki karma.
I would head over to IRC and see if someone can grant you over there.
Great work.
Lewis
On Tue, Jun 17, 2014 at 5:16 PM, Mathieu D'Amours <matt@forest.io> wrote:
> Hey all,
>
> I was wondering if the Erlang driver I’m maintaining at
> http://github.com/matehat/cqerl could be added to the list of community
> drivers for cassandra. It’s the most popular one for Erlang out there at
> the moment and the most actively maintained.
>
> Thanks!
>
> md ∙ matt@damours.org
>
>
>
--
*Lewis*

Hey all,
I was wondering if the Erlang driver I’m maintaining at http://github.com/matehat/cqerl
could be added to the list of community drivers for cassandra. It’s the most popular one
for Erlang out there at the moment and the most actively maintained.
Thanks!
md ∙ matt@damours.org

Re: How to deal with org.apache.cassandra.db.marshal.* types in client drivers?Lewis John Mcgibbney <lewis.mcgibbney@gmail.com>urn:uuid:%3cCAGaRif0BDbvbr=5jEZfTs=d_3ROxv1UN7B0yYz+JFj6MpjVhAA@mail-gmail-com%3e2014-04-14T10:24:01Z

Please see page 42 Data Types in the following document
http://www.datastax.com/documentation/cql/3.1/pdf/cql31.pdf
hth
Lewis
On Mon, Apr 14, 2014 at 9:31 AM, Nimi Wariboko Jr.
<nimiwaribokoj@gmail.com>wrote:
> Hi,
>
> After upgrading my cluster from 1.2.16 to 2.0.6, when using the Cassandra
> community Go driver (http://github.com/gocql/gocql), I’ve found that
> columns that used to return the native TypeTimestamp (0x000D), now return
> TypeCustom (0x0000) with the name
> 'org.apache.cassandra.db.marshal.DataType’. As far as I can tell the
> serialization format is identical to TypeTimestamp, but it is unclear why
> Cassandra made the change, or how to reproduce it (if I create a new table,
> Cassandra 2.0.6 will return TypeTimestamp).
>
> After studying the other drivers its clear that there are special cases
> for the ‘org.apache.cassandra.db.marshal.*’ types however I can’t seem to
> find any documentation on what types exist and how to deal with them (other
> than what’s in code). Can someone point me to a documentation and/or
> explain these types?
>
> Thanks
>
>
--
*Lewis*

How to deal with org.apache.cassandra.db.marshal.* types in client drivers?"Nimi Wariboko Jr." <nimiwaribokoj@gmail.com>urn:uuid:%3c9193D5A5F9034C52AE0AD00D4586B9B7@gmail-com%3e2014-04-14T08:31:22Z

Hi,
After upgrading my cluster from 1.2.16 to 2.0.6, when using the Cassandra community Go driver
(http://github.com/gocql/gocql), I’ve found that columns that used to return the native
TypeTimestamp (0x000D), now return TypeCustom (0x0000) with the name 'org.apache.cassandra.db.marshal.DataType’.
As far as I can tell the serialization format is identical to TypeTimestamp, but it is unclear
why Cassandra made the change, or how to reproduce it (if I create a new table, Cassandra
2.0.6 will return TypeTimestamp).
After studying the other drivers its clear that there are special cases for the ‘org.apache.cassandra.db.marshal.*’
types however I can’t seem to find any documentation on what types exist and how to deal
with them (other than what’s in code). Can someone point me to a documentation and/or explain
these types?
Thanks

Re: How should clients handle the user defined types in 2.1?Edward Capriolo <edlinuxguru@gmail.com>urn:uuid:%3cCAENxBwzhqnSY4yNr1pi0BQk=MooorEEq6-cvNCo2mP-yNbCJqA@mail-gmail-com%3e2014-03-06T15:52:15Z